: this is the first time the fda has used new powers from a law passed just last year. to shutter a company it says is a continuing health risk. the government says it will not allow the country's largest organic peanut butter producer to reopen, until it says, sunland no longer has a reasonable probability of causing serious health consequences or death to humans. 8-year-old nate was one of those who ate sunland peanut butter sold at trader joe's. and feels he paid the price. >> it felt very painful. the stomach cramps. i was screaming loud. and i was saying, why does this happen to me? >> reporter: and this morning, food safety groups are hailing the shutdown as a warning to food companies that the new power granted the fda is not just for show. >> this gives us hope that fda is prepared to act aggressively and protect consumers. >> reporter: perhaps the most serious charge is that sunland continued to sell salmonella-contaminated products after they failed tests for the disease. sunland tells abc news, that's not true. saying it did not knowingly sell tainted peanuts or peanut butter. and they'r